Cutaneous mixed tumor with extensive chondroid metaplasia: a potential mimic of cutaneous chondroma.

True cutaneous chondromas are extremely rare. Previously they have reportedly been confused with soft tissue chondromas and cartilaginous developmental anomalies. Monophasic mixed tumor could potentially also be mistakenly diagnosed as a true cutaneous chondroma. We report a cutaneous mixed tumor with massive chondroid metaplasia that mimicked a true cutaneous chondroma. We also propose that cutaneous mixed tumor with chondroid metaplasia may better explain the presence of primary cartilaginous tumors in the skin and true cutaneous chondroma may not be a real entity.